- util::http::*: since spool file is server provided, use option "-spool" to indicate that spooling is intended. The actual name of the spool file is retuned in the "file" component of the dict.- fix spool file logic for ns_http/ns_ssl- allow spooling as well for curl- drop "-depth" for the toplevel interface, since it is used for iteration on the (private) implementation level- set max_depth per default to 10 to handle redirects automatically